<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
         * {
                margin: 0;
                padding: 0;
            }
        .tb-promo {
            position: relative;
            width: 520px;
            height: 280px;
            margin: 100px auto;
           
        }
        /* 并集选择器 */
        .prev,
        .next
         {
            position: absolute;
            top: 50%;
            margin-top: -15px;
            width: 20px;
            height: 30px;
            text-decoration: none;
            color: #ffffff;
            background: rgba(0,0,0,0.3);
        }
        .prev {
            left: 0;
             border-top-right-radius: 15px;
            border-bottom-right-radius: 15px;
            
        }
        .next {
           right: 0;
            border-top-left-radius: 15px;
            border-bottom-left-radius: 15px;
        }
        .promo-nav {
            position: absolute;
            bottom: 10px;
            left: 50%;
            margin-left: -35px;
            width: 70px;
            height: 13px;
            background:rgba(255,255,255,0.3);
            border-radius: 7px;
        }
        .promo-nav li {
            float: left;
            list-style: none;
            width: 8px;
            height: 8px;
            background-color: #ffffff;
            border-radius: 50%;
            margin: 3px;   
        }
        .promo-nav .selected {
            background-color: #ff5000;
        }
        
    </style>
</head>
<body>
    <div class="tb-promo">
        <img src="images/tb-promo.jpg" alt="">
        <a href="#" class="prev"> < </a>
        <a href="" class="next"> > </a>
        <ul class="promo-nav">
            <li class="selected"></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</body>
</html>